塑性階段卸載后的殘余應力理論計算及數(shù)值模擬*
劉成清1，李俊君1，雷 拓2,施衛(wèi)星3
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(1 西南交通大學土木工程學院,成都 610031；2 長安大學建筑工程學院，西安，710061；3 同濟大學土木工程防災國家重點實驗室，上海 200092）[摘要] 以受彎構(gòu)件和三桿結(jié)構(gòu)為例，推導了塑性階段卸載后殘余應力的理論計算公式，接著通過利用現(xiàn)有的一些大型通用有限元軟件的彈塑性分析，比較精確地模擬獲得殘余應力和殘余變形的值，為結(jié)構(gòu)或者構(gòu)件在反復荷載作用（如地震作用或者疲勞循環(huán)作用）下的殘余應力分析指出了一條有用的途徑。[關(guān)鍵詞] 塑性; 殘余應力; 計算公式; 數(shù)值模擬中圖分類號：TU311.3 文獻標識碼：A 文章編號：1002-848X(2013)S2-0441-04Theoretical calculation and numerical simulation on residual stress after unloading in the plastic phaseLiu Chengqing1, Li Junjun1,Lei Tuo2, Shi Weixing3(1 School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China;2 School of Civil Engineering, Chang’an University, Xi’an 710061, China;3 State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China)Abstract: Theoretical formulas of residual stress were derived in bending members and the structures of three members. Using the existing large elastic-plastic finite element analysis software, the precise simulation of residual stress and residual deformation were carried out. A useful way about the residual stress analysis on the structure or component in the repeated loads was pointed out.Keywords: plastic; residual stress; formula; numerical simulation
